These points are also on the negative side of the x axis, at -pi/4 and -pi/2. When we move along the x axis, notice what happens to the y value. On the left side of zero, tangent is negative. At x=-pi/4, tangent=-1.
The Independent Online. David Cameron may have called a referendum on the EU to blackmail Europe, according to Vladimir Putin. The Russian president also questioned Mr Cameronâs decision to call the vote, as it has caused a âgreat problemâ.
Donald Trump gets a call from Vladimir Putin. Russian President Vladimir Putin (Alexei Nikolsky / Associated Press) Russian President Vladimir Putin, who became a focal point of the presidential campaign, called President-elect Donald Trump on Monday. Trump's transition team confirmed the call, to offer his congratulations on winning a historic election..